The problem |
The Cause |
The Solution |
Chatter-spaced Marks on the Work Surface |
Machine Vibration |
Check alignment & couplings |
| Infeed rate too low |
Increase infeed rate |
| Work speed too slow |
Increase work speed |
| Wheel out of balance |
Rebalance carefully, repeat after truing |
| Wheel out of round |
True before & after balancing. True sides safely |
| Wheel too hard |
Select softer grade or coarser grit |
Scratching-Poor |
Machine vibration |
Check for vibration of the machine & for vibration transmitted to the machine. Repair/replace machine parts |
Poor finish |
Dirty Coolant |
Provide efficient filter, clean tank often, flush guards |
| Faulty wheel conditioning |
Use sharper tools, flush wheel after conditioning, condition more frequently |
| Wheel out of round |
Repeat truing process, true sides to face. |
| Wheel too coarse |
Select finer grit size |
| Wheel too soft |
Select harder grade, decrease work speed & infeed rate. |
| Infeed rate too high |
Reduce rate of infeed |
Heat/Stress Damage (Burning) |
Infeed rate too high |
Reduce rate of infeed |
| Work speed too slow |
Increase work speed |
| Insufficient coolant |
Increase coolant flow & check direction |
| Wheel speed too high |
Reduce wheel speed |
| Insufficient conditioning |
Condition wheel more frequently |
| Wheel too hard |
Select softer grade wheel |
| Wheel too dense |
Use more open structured wheel |
Wheel Loading or Glazing |
Faulty wheel conditioning |
Use sharper tool, flush wheel after conditioning. Condition more frequently |
| Faulty coolant |
Increase coolant flow, Use cleaner, thinner coolant |
| Wheel acts too hard |
Increase infeed rate, work speed. Use softer or coarser wheel |
